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<FONT color="green">001</FONT>    package gui;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.awt.BorderLayout;<a name="line.3"></a>
<FONT color="green">004</FONT>    import java.awt.Color;<a name="line.4"></a>
<FONT color="green">005</FONT>    import java.awt.Dimension;<a name="line.5"></a>
<FONT color="green">006</FONT>    import java.awt.Frame;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.awt.GridLayout;<a name="line.7"></a>
<FONT color="green">008</FONT>    import java.awt.Toolkit;<a name="line.8"></a>
<FONT color="green">009</FONT>    import javax.swing.BorderFactory;<a name="line.9"></a>
<FONT color="green">010</FONT>    import javax.swing.JButton;<a name="line.10"></a>
<FONT color="green">011</FONT>    import javax.swing.JFrame;<a name="line.11"></a>
<FONT color="green">012</FONT>    import javax.swing.JLabel;<a name="line.12"></a>
<FONT color="green">013</FONT>    import javax.swing.JOptionPane;<a name="line.13"></a>
<FONT color="green">014</FONT>    import javax.swing.JPanel;<a name="line.14"></a>
<FONT color="green">015</FONT>    import javax.swing.JScrollPane;<a name="line.15"></a>
<FONT color="green">016</FONT>    import javax.swing.JTextArea;<a name="line.16"></a>
<FONT color="green">017</FONT>    import javax.swing.JTextField;<a name="line.17"></a>
<FONT color="green">018</FONT>    import javax.swing.ScrollPaneConstants;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    import algorithms.GroverCircuit;<a name="line.20"></a>
<FONT color="green">021</FONT>    import register.Register;<a name="line.21"></a>
<FONT color="green">022</FONT>    <a name="line.22"></a>
<FONT color="green">023</FONT>    /**<a name="line.23"></a>
<FONT color="green">024</FONT>     * Creates and manages the UI.<a name="line.24"></a>
<FONT color="green">025</FONT>     * @author Matt Cole<a name="line.25"></a>
<FONT color="green">026</FONT>     */<a name="line.26"></a>
<FONT color="green">027</FONT>    public class UserInterface {<a name="line.27"></a>
<FONT color="green">028</FONT>            <a name="line.28"></a>
<FONT color="green">029</FONT>            /** Width of users desktop */<a name="line.29"></a>
<FONT color="green">030</FONT>            private int screenWidth;<a name="line.30"></a>
<FONT color="green">031</FONT>            /** Height of users desktop */<a name="line.31"></a>
<FONT color="green">032</FONT>            private int screenHeight;<a name="line.32"></a>
<FONT color="green">033</FONT>            /** Store the grover circuit object */<a name="line.33"></a>
<FONT color="green">034</FONT>            private GroverCircuit circuit;<a name="line.34"></a>
<FONT color="green">035</FONT>            <a name="line.35"></a>
<FONT color="green">036</FONT>            // Components of the UI that can be manipulated after the widow is first drawn<a name="line.36"></a>
<FONT color="green">037</FONT>            /** Introduction fame object */<a name="line.37"></a>
<FONT color="green">038</FONT>            private JFrame introFrame;<a name="line.38"></a>
<FONT color="green">039</FONT>            /** Number of qubits field in into frame */<a name="line.39"></a>
<FONT color="green">040</FONT>            private JTextField numQubitsField;<a name="line.40"></a>
<FONT color="green">041</FONT>            /** Searched element field in into frame */<a name="line.41"></a>
<FONT color="green">042</FONT>            private JTextField searchField;<a name="line.42"></a>
<FONT color="green">043</FONT>            /** Main program frame */<a name="line.43"></a>
<FONT color="green">044</FONT>            private JFrame mainFrame;<a name="line.44"></a>
<FONT color="green">045</FONT>            /** Data text area displaying program info */<a name="line.45"></a>
<FONT color="green">046</FONT>            private JTextArea textArea;<a name="line.46"></a>
<FONT color="green">047</FONT>            /** Panel showing the rotation of states in vector diagram */<a name="line.47"></a>
<FONT color="green">048</FONT>            private VectorPlot vectorPlot;<a name="line.48"></a>
<FONT color="green">049</FONT>            /** Panel of the probabilities of the qubits */<a name="line.49"></a>
<FONT color="green">050</FONT>            private ProbPlot probPlot;<a name="line.50"></a>
<FONT color="green">051</FONT>            /** Panel showing options, like functional vs matrix representation of gates */<a name="line.51"></a>
<FONT color="green">052</FONT>            private OptionsPanel optionsPanel;<a name="line.52"></a>
<FONT color="green">053</FONT>            /** Take measurement button */<a name="line.53"></a>
<FONT color="green">054</FONT>            private JButton measureButton;<a name="line.54"></a>
<FONT color="green">055</FONT>            /** Next step in program button */<a name="line.55"></a>
<FONT color="green">056</FONT>            private JButton nextStepButton;<a name="line.56"></a>
<FONT color="green">057</FONT>            <a name="line.57"></a>
<FONT color="green">058</FONT>            /** Constructor for the UI.<a name="line.58"></a>
<FONT color="green">059</FONT>             * <a name="line.59"></a>
<FONT color="green">060</FONT>             * @param circuit Grover circuit to display UI for.<a name="line.60"></a>
<FONT color="green">061</FONT>             */<a name="line.61"></a>
<FONT color="green">062</FONT>            public UserInterface(GroverCircuit circuit) {<a name="line.62"></a>
<FONT color="green">063</FONT>                    <a name="line.63"></a>
<FONT color="green">064</FONT>                    this.circuit = circuit;<a name="line.64"></a>
<FONT color="green">065</FONT>                    <a name="line.65"></a>
<FONT color="green">066</FONT>                    // Get the dimensions of the screen - used to centre the windows<a name="line.66"></a>
<FONT color="green">067</FONT>                    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();<a name="line.67"></a>
<FONT color="green">068</FONT>                    screenWidth = (int)d.getWidth();<a name="line.68"></a>
<FONT color="green">069</FONT>                    screenHeight = (int)d.getHeight();<a name="line.69"></a>
<FONT color="green">070</FONT>                    <a name="line.70"></a>
<FONT color="green">071</FONT>                    createIntro();<a name="line.71"></a>
<FONT color="green">072</FONT>                    createMain();<a name="line.72"></a>
<FONT color="green">073</FONT>                    <a name="line.73"></a>
<FONT color="green">074</FONT>            }<a name="line.74"></a>
<FONT color="green">075</FONT>            <a name="line.75"></a>
<FONT color="green">076</FONT>            /**<a name="line.76"></a>
<FONT color="green">077</FONT>             * Creates the simple intro window used to get the user inputs.<a name="line.77"></a>
<FONT color="green">078</FONT>             */<a name="line.78"></a>
<FONT color="green">079</FONT>            public void createIntro() {<a name="line.79"></a>
<FONT color="green">080</FONT>                    <a name="line.80"></a>
<FONT color="green">081</FONT>                    // Create the intro frame<a name="line.81"></a>
<FONT color="green">082</FONT>                    introFrame = new JFrame("Quantum Computer");<a name="line.82"></a>
<FONT color="green">083</FONT>                    introFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);<a name="line.83"></a>
<FONT color="green">084</FONT>                    introFrame.setResizable(false);<a name="line.84"></a>
<FONT color="green">085</FONT>    <a name="line.85"></a>
<FONT color="green">086</FONT>                    // Create button panel<a name="line.86"></a>
<FONT color="green">087</FONT>                    JButton nextButton = new JButton("Next");<a name="line.87"></a>
<FONT color="green">088</FONT>                    nextButton.addActionListener(circuit);<a name="line.88"></a>
<FONT color="green">089</FONT>                    nextButton.setActionCommand("next");<a name="line.89"></a>
<FONT color="green">090</FONT>                    JButton exitButton = new JButton("Exit");<a name="line.90"></a>
<FONT color="green">091</FONT>                    exitButton.addActionListener(circuit);<a name="line.91"></a>
<FONT color="green">092</FONT>                    exitButton.setActionCommand("exit");<a name="line.92"></a>
<FONT color="green">093</FONT>                    JPanel buttonPanel = new JPanel();<a name="line.93"></a>
<FONT color="green">094</FONT>                    buttonPanel.setBorder(BorderFactory.createEmptyBorder(0, 20, 20, 20));<a name="line.94"></a>
<FONT color="green">095</FONT>                    buttonPanel.add(nextButton);<a name="line.95"></a>
<FONT color="green">096</FONT>                    buttonPanel.add(exitButton);<a name="line.96"></a>
<FONT color="green">097</FONT>                    <a name="line.97"></a>
<FONT color="green">098</FONT>                    // Create label panel<a name="line.98"></a>
<FONT color="green">099</FONT>                    int min = circuit.getMinNumQubits();<a name="line.99"></a>
<FONT color="green">100</FONT>                    int max = circuit.getMaxNumQubits();<a name="line.100"></a>
<FONT color="green">101</FONT>                    JLabel numQubitsLabel = new JLabel("Enter n - the number of qubits in the register (between " + min + " and " + max + "):");<a name="line.101"></a>
<FONT color="green">102</FONT>                    JLabel searchLabel = new JLabel("Enter the search element (between 0 and (2^n)-1):");<a name="line.102"></a>
<FONT color="green">103</FONT>                    JPanel labelPanel = new JPanel(new GridLayout(0,1));<a name="line.103"></a>
<FONT color="green">104</FONT>                    labelPanel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 0));<a name="line.104"></a>
<FONT color="green">105</FONT>                    labelPanel.add(numQubitsLabel);<a name="line.105"></a>
<FONT color="green">106</FONT>                    labelPanel.add(searchLabel);<a name="line.106"></a>
<FONT color="green">107</FONT>    <a name="line.107"></a>
<FONT color="green">108</FONT>                    // Create text field panel<a name="line.108"></a>
<FONT color="green">109</FONT>                    numQubitsField = new JTextField(10);<a name="line.109"></a>
<FONT color="green">110</FONT>                    searchField = new JTextField(10);<a name="line.110"></a>
<FONT color="green">111</FONT>                    JPanel fieldPanel = new JPanel(new GridLayout(0,1));<a name="line.111"></a>
<FONT color="green">112</FONT>                    fieldPanel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));<a name="line.112"></a>
<FONT color="green">113</FONT>                    fieldPanel.add(numQubitsField);<a name="line.113"></a>
<FONT color="green">114</FONT>                    fieldPanel.add(searchField);<a name="line.114"></a>
<FONT color="green">115</FONT>    <a name="line.115"></a>
<FONT color="green">116</FONT>                    // Combine the text field and label panel<a name="line.116"></a>
<FONT color="green">117</FONT>                    numQubitsLabel.setLabelFor(numQubitsField);<a name="line.117"></a>
<FONT color="green">118</FONT>                    searchLabel.setLabelFor(searchField);<a name="line.118"></a>
<FONT color="green">119</FONT>                    JPanel inputPanel = new JPanel(new BorderLayout());<a name="line.119"></a>
<FONT color="green">120</FONT>                    inputPanel.add(labelPanel, BorderLayout.CENTER);<a name="line.120"></a>
<FONT color="green">121</FONT>                    inputPanel.add(fieldPanel, BorderLayout.LINE_END);<a name="line.121"></a>
<FONT color="green">122</FONT>                    <a name="line.122"></a>
<FONT color="green">123</FONT>                    // Add buttons panel and input panel to the frame<a name="line.123"></a>
<FONT color="green">124</FONT>                    introFrame.getContentPane().add(inputPanel, BorderLayout.CENTER);<a name="line.124"></a>
<FONT color="green">125</FONT>                    introFrame.getContentPane().add(buttonPanel, BorderLayout.PAGE_END);<a name="line.125"></a>
<FONT color="green">126</FONT>                    <a name="line.126"></a>
<FONT color="green">127</FONT>                    // Calculate the position<a name="line.127"></a>
<FONT color="green">128</FONT>                    introFrame.pack();<a name="line.128"></a>
<FONT color="green">129</FONT>                    int width = introFrame.getWidth();<a name="line.129"></a>
<FONT color="green">130</FONT>                    int height = introFrame.getHeight();<a name="line.130"></a>
<FONT color="green">131</FONT>                    int x = (screenWidth - width)/2;<a name="line.131"></a>
<FONT color="green">132</FONT>                    int y = (screenHeight- height)/2;<a name="line.132"></a>
<FONT color="green">133</FONT>                    introFrame.setLocation(x, y);<a name="line.133"></a>
<FONT color="green">134</FONT>                    <a name="line.134"></a>
<FONT color="green">135</FONT>            }<a name="line.135"></a>
<FONT color="green">136</FONT>            <a name="line.136"></a>
<FONT color="green">137</FONT>            /**<a name="line.137"></a>
<FONT color="green">138</FONT>             * Creates the main program window in which to display the information about the<a name="line.138"></a>
<FONT color="green">139</FONT>             * state of the register.<a name="line.139"></a>
<FONT color="green">140</FONT>             */<a name="line.140"></a>
<FONT color="green">141</FONT>            public void createMain() {<a name="line.141"></a>
<FONT color="green">142</FONT>                    <a name="line.142"></a>
<FONT color="green">143</FONT>                    // Create the main frame<a name="line.143"></a>
<FONT color="green">144</FONT>                    mainFrame = new JFrame("Quantum Computer");<a name="line.144"></a>
<FONT color="green">145</FONT>                    mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);<a name="line.145"></a>
<FONT color="green">146</FONT>                    mainFrame.getContentPane().setLayout(new BorderLayout());<a name="line.146"></a>
<FONT color="green">147</FONT>                    <a name="line.147"></a>
<FONT color="green">148</FONT>                    // Create the plots<a name="line.148"></a>
<FONT color="green">149</FONT>                    vectorPlot = new VectorPlot(screenWidth/2);<a name="line.149"></a>
<FONT color="green">150</FONT>                    probPlot = new ProbPlot(screenWidth/2);<a name="line.150"></a>
<FONT color="green">151</FONT>                    <a name="line.151"></a>
<FONT color="green">152</FONT>                    // Create the options panel<a name="line.152"></a>
<FONT color="green">153</FONT>                    optionsPanel = new OptionsPanel();<a name="line.153"></a>
<FONT color="green">154</FONT>                    <a name="line.154"></a>
<FONT color="green">155</FONT>                    // Create the data text area<a name="line.155"></a>
<FONT color="green">156</FONT>                    textArea = new JTextArea(9, 50);<a name="line.156"></a>
<FONT color="green">157</FONT>                    textArea.setEditable(false);<a name="line.157"></a>
<FONT color="green">158</FONT>                    JScrollPane dataPanel = new JScrollPane(textArea,<a name="line.158"></a>
<FONT color="green">159</FONT>                                    ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,<a name="line.159"></a>
<FONT color="green">160</FONT>                                    ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);<a name="line.160"></a>
<FONT color="green">161</FONT>                    dataPanel.setBackground(Color.white);<a name="line.161"></a>
<FONT color="green">162</FONT>                    dataPanel.setBorder(BorderFactory.createTitledBorder("Data"));<a name="line.162"></a>
<FONT color="green">163</FONT>                    int dataPanelWidth = screenWidth - optionsPanel.getWidthAndHeight();<a name="line.163"></a>
<FONT color="green">164</FONT>                    int dataPanelHeight = optionsPanel.getWidthAndHeight();<a name="line.164"></a>
<FONT color="green">165</FONT>                    dataPanel.setPreferredSize(new Dimension(dataPanelWidth, dataPanelHeight));<a name="line.165"></a>
<FONT color="green">166</FONT>                    <a name="line.166"></a>
<FONT color="green">167</FONT>                    // Combine data text area and options panel<a name="line.167"></a>
<FONT color="green">168</FONT>                    JPanel titlePanel = new JPanel(new BorderLayout());<a name="line.168"></a>
<FONT color="green">169</FONT>                    titlePanel.add(dataPanel, BorderLayout.LINE_START);<a name="line.169"></a>
<FONT color="green">170</FONT>                    titlePanel.add(optionsPanel, BorderLayout.LINE_END);<a name="line.170"></a>
<FONT color="green">171</FONT>                    <a name="line.171"></a>
<FONT color="green">172</FONT>                    // Create the buttons panel<a name="line.172"></a>
<FONT color="green">173</FONT>                    nextStepButton = new JButton("Next Step");<a name="line.173"></a>
<FONT color="green">174</FONT>                    nextStepButton.addActionListener(circuit);<a name="line.174"></a>
<FONT color="green">175</FONT>                    nextStepButton.setActionCommand("next_step");<a name="line.175"></a>
<FONT color="green">176</FONT>                    JButton exitButton = new JButton("Exit");<a name="line.176"></a>
<FONT color="green">177</FONT>                    exitButton.addActionListener(circuit);<a name="line.177"></a>
<FONT color="green">178</FONT>                    exitButton.setActionCommand("exit");<a name="line.178"></a>
<FONT color="green">179</FONT>                    measureButton = new JButton("Measure");<a name="line.179"></a>
<FONT color="green">180</FONT>                    measureButton.addActionListener(circuit);<a name="line.180"></a>
<FONT color="green">181</FONT>                    measureButton.setActionCommand("measure");<a name="line.181"></a>
<FONT color="green">182</FONT>                    JButton resetButton = new JButton("Reset");<a name="line.182"></a>
<FONT color="green">183</FONT>                    resetButton.addActionListener(circuit);<a name="line.183"></a>
<FONT color="green">184</FONT>                    resetButton.setActionCommand("reset");<a name="line.184"></a>
<FONT color="green">185</FONT>                    JButton newButton = new JButton("New Simulation");<a name="line.185"></a>
<FONT color="green">186</FONT>                    newButton.addActionListener(circuit);<a name="line.186"></a>
<FONT color="green">187</FONT>                    newButton.setActionCommand("new");<a name="line.187"></a>
<FONT color="green">188</FONT>                    JPanel buttonPanel = new JPanel();<a name="line.188"></a>
<FONT color="green">189</FONT>                    buttonPanel.add(newButton);<a name="line.189"></a>
<FONT color="green">190</FONT>                    buttonPanel.add(resetButton);<a name="line.190"></a>
<FONT color="green">191</FONT>                    buttonPanel.add(nextStepButton);<a name="line.191"></a>
<FONT color="green">192</FONT>                    buttonPanel.add(measureButton);<a name="line.192"></a>
<FONT color="green">193</FONT>                    buttonPanel.add(exitButton);<a name="line.193"></a>
<FONT color="green">194</FONT>                    buttonPanel.setBackground(Color.white);<a name="line.194"></a>
<FONT color="green">195</FONT>                    <a name="line.195"></a>
<FONT color="green">196</FONT>                    // Add the components to frame<a name="line.196"></a>
<FONT color="green">197</FONT>                    mainFrame.getContentPane().add(probPlot, BorderLayout.LINE_START);<a name="line.197"></a>
<FONT color="green">198</FONT>                    mainFrame.getContentPane().add(vectorPlot, BorderLayout.LINE_END);<a name="line.198"></a>
<FONT color="green">199</FONT>                    mainFrame.getContentPane().add(titlePanel, BorderLayout.PAGE_START);<a name="line.199"></a>
<FONT color="green">200</FONT>                    mainFrame.getContentPane().add(buttonPanel, BorderLayout.PAGE_END);<a name="line.200"></a>
<FONT color="green">201</FONT>                    <a name="line.201"></a>
<FONT color="green">202</FONT>                    // Set the size of the frame<a name="line.202"></a>
<FONT color="green">203</FONT>                    mainFrame.pack();<a name="line.203"></a>
<FONT color="green">204</FONT>                    mainFrame.setExtendedState(Frame.MAXIMIZED_BOTH);<a name="line.204"></a>
<FONT color="green">205</FONT>                    <a name="line.205"></a>
<FONT color="green">206</FONT>            }<a name="line.206"></a>
<FONT color="green">207</FONT>    <a name="line.207"></a>
<FONT color="green">208</FONT>            /**<a name="line.208"></a>
<FONT color="green">209</FONT>             * Displays the intro window, clearing and disabling (but not hiding) the main window.<a name="line.209"></a>
<FONT color="green">210</FONT>             */<a name="line.210"></a>
<FONT color="green">211</FONT>            public void showIntro() {<a name="line.211"></a>
<FONT color="green">212</FONT>                    resetMain();<a name="line.212"></a>
<FONT color="green">213</FONT>                    mainFrame.setEnabled(false);<a name="line.213"></a>
<FONT color="green">214</FONT>                    numQubitsField.setText("");<a name="line.214"></a>
<FONT color="green">215</FONT>                    searchField.setText("");<a name="line.215"></a>
<FONT color="green">216</FONT>                    numQubitsField.requestFocusInWindow();<a name="line.216"></a>
<FONT color="green">217</FONT>                    introFrame.setVisible(true);<a name="line.217"></a>
<FONT color="green">218</FONT>            }<a name="line.218"></a>
<FONT color="green">219</FONT>            <a name="line.219"></a>
<FONT color="green">220</FONT>            /**<a name="line.220"></a>
<FONT color="green">221</FONT>             * Initial setup of the main window for a given register and search element, hiding the intro window.<a name="line.221"></a>
<FONT color="green">222</FONT>             * @param reg<a name="line.222"></a>
<FONT color="green">223</FONT>             * @param searchElem<a name="line.223"></a>
<FONT color="green">224</FONT>             */<a name="line.224"></a>
<FONT color="green">225</FONT>            public void showMain(Register reg, int searchElem) {<a name="line.225"></a>
<FONT color="green">226</FONT>                    resetMain();<a name="line.226"></a>
<FONT color="green">227</FONT>                    introFrame.setVisible(false);<a name="line.227"></a>
<FONT color="green">228</FONT>                    probPlot.setup(reg);<a name="line.228"></a>
<FONT color="green">229</FONT>                    vectorPlot.setup(reg, searchElem);<a name="line.229"></a>
<FONT color="green">230</FONT>                    nextStepButton.setEnabled(true);<a name="line.230"></a>
<FONT color="green">231</FONT>                    measureButton.setEnabled(false);<a name="line.231"></a>
<FONT color="green">232</FONT>                    mainFrame.setEnabled(true);<a name="line.232"></a>
<FONT color="green">233</FONT>                    mainFrame.setVisible(true);<a name="line.233"></a>
<FONT color="green">234</FONT>            }<a name="line.234"></a>
<FONT color="green">235</FONT>            <a name="line.235"></a>
<FONT color="green">236</FONT>            /**<a name="line.236"></a>
<FONT color="green">237</FONT>             * Clears all components of the main frame.<a name="line.237"></a>
<FONT color="green">238</FONT>             */<a name="line.238"></a>
<FONT color="green">239</FONT>            public void resetMain() {<a name="line.239"></a>
<FONT color="green">240</FONT>                    probPlot.reset();<a name="line.240"></a>
<FONT color="green">241</FONT>                    vectorPlot.reset();<a name="line.241"></a>
<FONT color="green">242</FONT>                    optionsPanel.reset();<a name="line.242"></a>
<FONT color="green">243</FONT>                    textArea.setText("");<a name="line.243"></a>
<FONT color="green">244</FONT>            }<a name="line.244"></a>
<FONT color="green">245</FONT>    <a name="line.245"></a>
<FONT color="green">246</FONT>            /**<a name="line.246"></a>
<FONT color="green">247</FONT>             * Updates the display of the main window for a given register.<a name="line.247"></a>
<FONT color="green">248</FONT>             * @param reg The register for which the display needs to be updated.<a name="line.248"></a>
<FONT color="green">249</FONT>             * @param action String to be printed to the UI.<a name="line.249"></a>
<FONT color="green">250</FONT>             * @param updateVectorPlot If true, the vector plot will also be updated when this method is called.<a name="line.250"></a>
<FONT color="green">251</FONT>             */<a name="line.251"></a>
<FONT color="green">252</FONT>            public void update(Register reg, String action, Boolean updateVectorPlot) {<a name="line.252"></a>
<FONT color="green">253</FONT>                    textArea.append(action+"\n");<a name="line.253"></a>
<FONT color="green">254</FONT>                    probPlot.update(reg);<a name="line.254"></a>
<FONT color="green">255</FONT>                    if(updateVectorPlot) {<a name="line.255"></a>
<FONT color="green">256</FONT>                            vectorPlot.update();<a name="line.256"></a>
<FONT color="green">257</FONT>                    }<a name="line.257"></a>
<FONT color="green">258</FONT>            }<a name="line.258"></a>
<FONT color="green">259</FONT>            <a name="line.259"></a>
<FONT color="green">260</FONT>            /**<a name="line.260"></a>
<FONT color="green">261</FONT>             * Removes the vector plot from the UI. For use when the register is measured.<a name="line.261"></a>
<FONT color="green">262</FONT>             */<a name="line.262"></a>
<FONT color="green">263</FONT>            public void removeRegStateVector() {<a name="line.263"></a>
<FONT color="green">264</FONT>                    vectorPlot.removeRegState();<a name="line.264"></a>
<FONT color="green">265</FONT>            }<a name="line.265"></a>
<FONT color="green">266</FONT>            <a name="line.266"></a>
<FONT color="green">267</FONT>            /**<a name="line.267"></a>
<FONT color="green">268</FONT>             * Enables the measure button. Used once the register has been prepared.<a name="line.268"></a>
<FONT color="green">269</FONT>             */<a name="line.269"></a>
<FONT color="green">270</FONT>            public void enableMeasureButton() {<a name="line.270"></a>
<FONT color="green">271</FONT>                    measureButton.setEnabled(true);<a name="line.271"></a>
<FONT color="green">272</FONT>            }<a name="line.272"></a>
<FONT color="green">273</FONT>            <a name="line.273"></a>
<FONT color="green">274</FONT>            /**<a name="line.274"></a>
<FONT color="green">275</FONT>             * Disables the step buttons on the UI. For use after a measurement is taken.<a name="line.275"></a>
<FONT color="green">276</FONT>             */<a name="line.276"></a>
<FONT color="green">277</FONT>            public void disableStepButtons() {<a name="line.277"></a>
<FONT color="green">278</FONT>                    measureButton.setEnabled(false);<a name="line.278"></a>
<FONT color="green">279</FONT>                    nextStepButton.setEnabled(false);<a name="line.279"></a>
<FONT color="green">280</FONT>            }<a name="line.280"></a>
<FONT color="green">281</FONT>            <a name="line.281"></a>
<FONT color="green">282</FONT>            /**<a name="line.282"></a>
<FONT color="green">283</FONT>             * Enables the next step and measure buttons on the UI.<a name="line.283"></a>
<FONT color="green">284</FONT>             */<a name="line.284"></a>
<FONT color="green">285</FONT>            public void enableStepButtons() {<a name="line.285"></a>
<FONT color="green">286</FONT>                    measureButton.setEnabled(true);<a name="line.286"></a>
<FONT color="green">287</FONT>                    nextStepButton.setEnabled(true);<a name="line.287"></a>
<FONT color="green">288</FONT>            }<a name="line.288"></a>
<FONT color="green">289</FONT>    <a name="line.289"></a>
<FONT color="green">290</FONT>            /**<a name="line.290"></a>
<FONT color="green">291</FONT>             * Uses JDialog to display an error message.<a name="line.291"></a>
<FONT color="green">292</FONT>             * @param msg Error message to be displayed.<a name="line.292"></a>
<FONT color="green">293</FONT>             */<a name="line.293"></a>
<FONT color="green">294</FONT>            public void inputError(String msg) {<a name="line.294"></a>
<FONT color="green">295</FONT>                    JOptionPane.showMessageDialog(introFrame, msg, "Error", JOptionPane.ERROR_MESSAGE);<a name="line.295"></a>
<FONT color="green">296</FONT>            }<a name="line.296"></a>
<FONT color="green">297</FONT>            <a name="line.297"></a>
<FONT color="green">298</FONT>            /**<a name="line.298"></a>
<FONT color="green">299</FONT>             * @return The contents of the reg size text field.<a name="line.299"></a>
<FONT color="green">300</FONT>             */<a name="line.300"></a>
<FONT color="green">301</FONT>            public String getNumQubits() {<a name="line.301"></a>
<FONT color="green">302</FONT>                    return numQubitsField.getText();<a name="line.302"></a>
<FONT color="green">303</FONT>            }<a name="line.303"></a>
<FONT color="green">304</FONT>            <a name="line.304"></a>
<FONT color="green">305</FONT>            /**<a name="line.305"></a>
<FONT color="green">306</FONT>             * @return The contents of the search text field.<a name="line.306"></a>
<FONT color="green">307</FONT>             */<a name="line.307"></a>
<FONT color="green">308</FONT>            public String getSearchElem() {<a name="line.308"></a>
<FONT color="green">309</FONT>                    return searchField.getText();<a name="line.309"></a>
<FONT color="green">310</FONT>            }<a name="line.310"></a>
<FONT color="green">311</FONT>    <a name="line.311"></a>
<FONT color="green">312</FONT>            /**<a name="line.312"></a>
<FONT color="green">313</FONT>             * Displays a message in the data area of the main display.<a name="line.313"></a>
<FONT color="green">314</FONT>             * @param msg The message to be displayed.<a name="line.314"></a>
<FONT color="green">315</FONT>             */<a name="line.315"></a>
<FONT color="green">316</FONT>            public void printMessage(String msg) {<a name="line.316"></a>
<FONT color="green">317</FONT>                    textArea.append(msg+"\n");<a name="line.317"></a>
<FONT color="green">318</FONT>            }<a name="line.318"></a>
<FONT color="green">319</FONT>    <a name="line.319"></a>
<FONT color="green">320</FONT>    }<a name="line.320"></a>




























































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